Magnetic separator.



'No. 663.304. Patented Dec. 4, I900 F. THEILENGERDES.

MAGNETIC SEPARATOB.

(Application filed June 3, 1900.)

(No Model.)

Mrs TATEES Prion.

ATENT FREDERICK THEILENGERDES, OF MEMPHIS, TENNESSEE, ASSIGNOR OF ONE- HALF TO WVALTER GOODMAN, OF SAME PLACE.

MAGNETIC SEPARATOR.

S?EOIFICATION forming part of Letters Patent No. 663,304, dated December 4:, 1900.

Application filed June 8,1900. Serial No. 1 9,531. No model.)

To all whom, it may concern:

Be it known that I, FREDERICK THEILEN- GERDES, a citizen of the United States, residing at Memphis, county of Shelby, State of Tennessee, have invented a new and useful Magnetic Separator, of which the following is a specification.

The object of this invention is to provide means whereby fragments of iron or other magnetic substance may be separated from granular or pulverized non-magnetic material. It often happens that in treating grain or seed of any kind the operating devices are seriously injured by nails, bits of wire, and the like which are by chance present in the material operated upon. In certain cases, particularly in removing lint from cottonseed, even more serious results follow, for the sparks caused by the fragments of iron set fire to the very inflammable lint, and if the fire be not quickly controlled it is very likely to extend from the lint within the machine to lint without it, and thus cause loss far beyond mere injury to the machine. All the evils suggested are avoided by passing the material to be operated upon in a thin stratum over an inclined plate or feed-board having in or near its surface and extending across the same a strong 'electromagnet' which will arrest and securely hold all magnetic fragments or bodies in the material passing down the incline.

For illustration I have shown the devices as combined with the common swinging feedboard of a cotton-gin or delinter, and in the accompanying drawings- Figure 1 is a transverse vertical section of such feed-board provided with my devices.

Fig. 2 is a View in the direction of the arrow 2 of Fig. 1. Fig. 3 shows the apparatus as seen in looking toward the free edge of the feedboard, a portion on the left being broken away to show a section on the line 3 3, Fig. 2.

In the views, A represents a feed-board adapted to be located and mounted as in ordinary machines of this kind-that is, extending from side to side of the machine-and hinged, as at A, so that its lower edge may be swung inward or outward at will, varying the position of its surface A, down which passes the material to be operated upon.

Upon the lower opposite side of the feed-board is a flat magnetic coil B, extending nearly from end to end of the board, provided with non-conducting end plates B, and having a thin soft-iron core 0, whose projecting ends C O are bent upward at right angles and extended nearly through the board to meet parallel bars 0 O fixed in magnetic contact with the ends 0 O by screws 0 and forming the positive and negative pole pieces, respectively, of the magnet and preferably projecting slightly beyond the general surface of the board. The end plates B are laterally supported by lugs B from the ends of the core, and the bars 0 may advantageously be secured to the central portion of the board by screwsD. Astheboardisconveniently made in three pieces, the parts are all rigidly bound together by bolts E, preferably of non-mag- 7o netic metal. The coil is in circuit with any suitable source F of electrical energy, and the circuit is provided with any suitable make and break devices F.

If the circuit be closed, the magnet will be energized, and the magnetic force will be the same from end to end of the bars or polepieces, and either (or both, if the body be long enough to act like an armature) will attract and hold magnetic bodies or particles that may be in the passing materials. By having two distinct bars or pole-pieces which, though one is positive and one negative, will each hold magnetic bodies any such bodies which by any chance fail to come in contact with the first will probably be caught by the second; and by having each raised or projecting above the boards surface the chance of failure to arrest any particle is still further diminished, and in practical use of this device for a long period not a single failure is known to have occurred.

The exact construction set forth need not be followed. For example, the bars or polepieces may be integral with the core, and the one-piece core and pole-pieces may be formed by slotting from end to end a tube approximately as long as the width of the sheet of material to be treated, or the ends of the core may simply be bent once, so that the edge I00 faces alone will be presented to the passing cotton-seed or other material.

What I claim is-- The combination with the inclined hinged feed-board, of the flat electromagnet-eore beneath and extending nearly from end to end of the same and having its broad ends turned upward into slits in the board, approximately parallel bars of inagnetizable material sunk in the upper surface of the board and resting upon said ends, non-conducting plates rest- IO ing against the upturned ends and oppositelyextending lugs, and a coil wound about the core between said plates, substantially as set forth.

In testimony whereof I afiix my signature in the presence of two witnesses.

FREDERICK THEILENGERDES.

Witnesses:

WALLACE GREENE, EDGAR B. MCBATH. 

